Nov. 2014 Ver. 0.3

MY-Semi Inc.

0

For pricing, delivery, and ordering information, pleases contact MY-Semi Inc. at +886-3-560-1668,

MY-Semi

MY9366

16-Channel High Accuracy Constant Current LED Driver

With 16bits Multiplex-PDM Control for Dynamic Scanning Systems

General Description

Features

The MY9366, 16-channel c o n s t a n t c u r r e n t LED

driver with 16bits grayscale M-PDM (Multiplex Pulse

Density Modulation) control, supports any dynamic

applications from 1/2 scan to 1/16 scan. The distinctive

M-PDM technology enhances the refresh rate of

dynamic scanning systems without increasing the

frequency of grayscale clock in order to prevent from

EMI interference. And the technique of automatic black

frame insertion could abate efficiently the influence of

blurs caused by the scanning switch.

The device operates over a 3.3V to 5V input voltage

current sinking outputs that are rated to 1 5 V and

string

of

LED.

current

at

each

output

is

resistor and could be adjusted by 6bits linear global

current control. By this advanced M-PDM approach, the

frame refresh rate could be improved up to 6000Hz in

dynamic 1/16 scanning systems and 12000Hz in

dynamic 1/8 scanning systems when the grayscale

resolution is 15bits / 16bits and the grayscale clock is

16MHz.

The MY9366’s on-board pass elements minimize the

need for external components, while at the same time,

providing

±3.5%(max.)

LED

current

accuracy.

Additional features include a ±0.1% regulated output

current capability and fast output transient response.

The MY9366 is available in a 24-pin SSOP/QFN package

and specified

over the -40°C to +85°C

ambient

temperature range.

✦ 3.3V ~ 5V Operating supply voltage (±10%)

✦

✦

✦

✦ 0.

0.

0.

0.4~30mA/5V Constant current output range

✦ 0.

0.

0.

0.4~20mA/3.3V Constant current output range

✦ 15V Rated output channels for long LED strings

✦ ±3.5%(max.)LED Current accuracy between channels

✦ ±3.5%(max.) LED Current accuracy between chips

✦ ±0.1% Output current regulation capability

✦ Build-in 8K bits SRAM

✦ For any dynamic systems from 1/2 scan to 1/16 scan

✦ 16bits grayscale resolution with Multiplex Pulse

p

n

✦ Supports diverse applications of 8bits~16bits

grayscale resolution

✦ Refresh rate up to 6000Hz in 1/16 scanning systems

Refresh rate up to 12000Hz in 1/8 scanning systems

✦ EMI reduction grayscale clock

p

n

✦ Ghost image abatement

✦ 6bits linear global current control

✦ 30MHz Clock frequency for data transfer

✦ Fast current transient response

✦ Current setting by one external resister

✦ Schmitt trigger input

✦ Low brightness uniformity compensation

✦ -40°C to +85°C Ambient temperature range

Applications

Order information

❑ Indoor and Outdoor LED Video Displays

❑ Variable Message Sign (VMS)

❑ Dot Matrix Module

❑ LCD Display Backlighting

Typical Operating Circuits

Pin Configuration

Part

Package Information

MY9366SS

SSOP24-150mil-0.635mm

2500 pcs/Reel

MY9366QF

QFN24-4mmx4mm-0.5mm

3000 pcs/Reel

Preliminary